On Fri, Feb 03, 2023 at 04:31:54AM +0100, Konrad Dybcio wrote: > > > On 2.02.2023 16:54, Johan Hovold wrote: > > On many Qualcomm platforms the PMIC RTC control and time registers are > > read-only so that the RTC time can not be updated. Instead an offset > > needs be stored in some machine-specific non-volatile memory, which the > > driver can take into account. > > > > Add support for storing a 32-bit offset from the Epoch in an nvmem cell > > so that the RTC time can be set on such platforms. > > > > Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx> > > --- > That's gonna be a stupid question, but just to make sure.. > > SDAM is rewritable, right? So that when somebody sets the time to > year 2077 by mistake, they won't have to put up with it for the next > 50 years? :D Heh, yes, it is re-writeable. Otherwise, using SDAM wouldn't really have been an alternative to using the UEFI offset. :) These registers are reset if you lose battery power so you'd be back at 1970 as expected if that ever happens too. Johan
